Unlock instant, AI-driven research and patent intelligence for your innovation.

Laser processing device and laser processing method

a laser processing and laser processing technology, applied in the direction of laser beam welding apparatus, manufacturing tools, welding apparatus, etc., can solve the problems of slow processing speed and complicated control, and achieve the effects of improving laser processing speed, high power density, and improving laser processing speed

Active Publication Date: 2019-08-29
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention aims to provide a laser processing device that can use both a small-beam diameter laser beam for melting and a larger-beam diameter laser beam for processing without the need for a second laser oscillator. This improves laser-processing speed by eliminating the need for a rise time. The invention uses a single laser beam that can switch between optical paths, resulting in better processing performance.

Problems solved by technology

Therefore, control becomes complicated.
Consequently, processing speed is slow.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Laser processing device and laser processing method
  • Laser processing device and laser processing method
  • Laser processing device and laser processing method

Examples

Experimental program
Comparison scheme
Effect test

first exemplary embodiment

[0024]As illustrated in FIGS. 1 and 2, laser processing device 1 includes laser oscillator 100 as a laser source, laser-beam switching apparatus 70 (laser-beam switcher) that selectively switches between a first optical path and a second optical path as an optical path along which laser beam 110 is to travel, processing head 80 (laser illuminator) that illuminates workpiece 900 with a laser beam, and first fiber 11 and second fiber 21 that form the first and second optical paths, respectively.

[0025]For example, laser oscillator 100 emits a high-power laser beam that is 4 kW and has near-infrared wavelength that has a central wavelength of 976 nm. Laser oscillator 100 includes controller 101 that performs various control of operation of laser processing device 1.

[0026]Laser-beam switching apparatus 70 includes bending module 72 that bends a laser beam emitted from laser oscillator 100 to change an optical path of the laser beam and transmits the bent laser beam, first fiber-connectio...

second exemplary embodiment

[0068]Hereinafter, the same parts as parts in the first exemplary embodiment are designated with the same reference marks, and only differences will be described.

[0069]As illustrated in FIGS. 3 and 4, processing head 380 is used for laser processing (laser welding in the present exemplary embodiment) of workpieces 901, 902. For example, workpieces 901, 902 are each a stainless sheet (SUS) that has a thickness of 0.8 mm.

[0070]Processing head 380 includes head main-body 381, first fiber-connection module 33 that is connected to an exit end of first fiber 11 and directs a beam that has exited through the exit end of first fiber 11 to head main-body 381, and second fiber-connection module 43 that is connected to an exit end of second fiber 21 and directs a beam that has exited through the exit end of second fiber 21 to head main-body 381.

[0071]Head main-body 381 includes reflective mirror 350 that bends and changes an optical path of the laser beam that has been directed into head main-...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Timeaaaaaaaaaa
Power densityaaaaaaaaaa
Login to View More

Abstract

Laser processing device (1) includes: laser-beam switching apparatus (70) that switches between a first optical path and a second optical path as an optical path along which a laser beam is to travel, the first optical path including first fiber (11), the second optical path including second fiber (21) that has a core diameter that is larger than a core diameter of first fiber (11); and processing head (80) that illuminates a same processed point on workpiece (900) with a laser beam that has passed through the first optical path or the second optical path. When illumination with laser beam that has passed through the first optical path is performed for a predetermined period of time, laser-beam switching apparatus (70) switches from the first optical path to the second optical path.

Description

[0001]This application is a U.S. national stage application of the PCT International Application No. PCT / JP2017 / 041178 filed on Nov. 16, 2017, which claims the benefit of foreign priority of Japanese patent application No. 2016-226625 filed on Nov. 22, 2016, the contents all of which are incorporated herein by reference.TECHNICAL FIELD[0002]The present invention relates to a laser processing device and a laser processing method that improve processing speed.BACKGROUND ART[0003]It is conventionally known that metal as a typical workpiece has a low absorption coefficient of laser beam in a solid state and a high absorption coefficient of laser beam in a molten state (see PTL 1, for example). That is, at a start of laser processing, a workpiece is solid and thus has a low absorption coefficient of laser beam. When the workpiece starts to melt, the workpiece has a high absorption coefficient of laser beam.[0004]Further, it is known that laser processing has suitable condensed-beam diame...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B23K26/06G02B6/42B23K26/38
CPCB23K26/0643B23K26/38G02B6/42B23K26/0648B23K26/067B23K26/032B23K26/064B23K26/0613B23K26/073
Inventor NAGAYASU, DOUKEINISHIMURA, HITOSHIWANG, JINGBORYUDO, MAKOTONISHIO, MASATOSHIYAMAGUCHI, HIDEAKITAKENAKA, YOSHIAKIEIZUMI, KIYOTAKAISHIKAWA, RYO
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD